Mastering Linear Equations and Word Problems

Extrait de la fiche de révision

📋 Course Outline

  1. Linear equations with fractions
  2. Solving linear equations with variables
  3. Harder challenge linear equation problems
  4. Word problems: perimeter and dimensions
  5. Word problems: cost, tickets, and integers

📖 1. Linear equations with fractions

🔑 Key Concepts & Definitions

  • Linear equation : A linear equation is an equation where the variable appears only to the first power and not inside products of variables.
  • Common denominator : A common denominator is a shared multiple used to rewrite fractions so they can be added or subtracted easily.
  • Distributive property : The distributive property lets you multiply a number across terms inside parentheses.

📝 Essential Points

  • Clear fractions by multiplying both sides by the least common denominator of all fractional coefficients.
  • When fractions include expressions like (x-10) or (2x+5), distribute before combining like terms.
  • After clearing denominators, collect x-terms on one side and constants on the other side.
  • Solve by isolating x, then check by substituting into the original fractional equation.

💡 Memory Hook

Fractions first: clear denominators, then collect x, then isolate x.

📖 2. Solving linear equations with variables

🔑 Key Concepts & Definitions

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Aperçu du QCM

1. Why is it useful to combine like terms before solving an equation such as ax+b=cx+d?

2. If a rectangle’s length is 3 cm more than twice its width, which equation models that relationship?

3. Which expression best represents a cost model with a starting fee plus a per-unit rate?

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Aperçu des flashcards

Linear equation — fractions?

Clear denominators before solving.

Solve linear equations — variables?

Isolate the variable on one side.

Hard linear problems — steps?

Distribute, combine, then isolate.

Perimeter problem — formula?

Perimeter = 2(length + width).

Word problem — dimensions?

Translate words into equations for length and width.

Cost word problem — setup?

Express total cost as start + rate×units.

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Questions fréquentes

Que contient la fiche de révision sur Mastering Linear Equations and Word Problems ?

La fiche de révision couvre les notions essentielles de Mastering Linear Equations and Word Problems. Elle est structurée par thématiques pour faciliter l'apprentissage et la mémorisation, avec des définitions clés, des explications et des synthèses.

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Combien de questions contient le QCM sur Mastering Linear Equations and Word Problems ?

Le QCM contient 10 questions à choix multiples avec corrections détaillées et explications pour chaque réponse. Idéal pour tester vos connaissances et identifier vos lacunes.

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Comment réviser Mastering Linear Equations and Word Problems avec les flashcards ?

Revizly propose 10 flashcards interactives sur Mastering Linear Equations and Word Problems. Chaque carte présente une question au recto et la réponse au verso, permettant une révision active et efficace basée sur la répétition espacée.

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